CN114032733A - Continuous reinforced concrete pavement and design method thereof - Google Patents
Continuous reinforced concrete pavement and design method thereof Download PDFInfo
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- CN114032733A CN114032733A CN202111341944.1A CN202111341944A CN114032733A CN 114032733 A CN114032733 A CN 114032733A CN 202111341944 A CN202111341944 A CN 202111341944A CN 114032733 A CN114032733 A CN 114032733A
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 81
- 230000002787 reinforcement Effects 0.000 claims abstract description 54
- 239000004567 concrete Substances 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000001186 cumulative effect Effects 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011800 void material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/16—Reinforcements
- E01C11/18—Reinforcements for cement concrete pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
Abstract
The invention discloses a continuous reinforced concrete pavement and a design method thereof. The invention provides a continuous reinforced concrete pavement, wherein a steel bar group is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar group, the edge anti-impact reinforcing steel bars are positioned at 0-L parts of the side edge of the pavement, L is 2-3 m, and the reinforcement ratio of the edge anti-impact reinforcing steel bars is more than or equal to 0.2%. The continuous reinforced concrete pavement provided by the invention effectively improves the capability of resisting the impact of heavy-load and ultra-heavy-load vehicles by arranging the anti-impact reinforcing steel bars in the range of the plate blocks at the edge of the pavement plate.
Description
Technical Field
The invention relates to the technical field of pavement structures, in particular to a continuous reinforced concrete pavement.
Background
With the continuous improvement of the development level of infrastructure in China, the application range of a continuous reinforced concrete pavement is continuously expanded and becomes one of the mainstream pavement structures of high-grade roads, but the existing standard design method has certain defects, so that the strength of the pavement is low and the pavement is not enough to keep long-term normal service under the background of increasing traffic volume.
The defects of the existing design method are embodied in the following points: 1. the concrete flexural tensile strength is used as a pavement strength control index, the concrete material flexural tensile strength is low, the construction quality variability is large, the reliability is low, and the pavement bearing capacity and the reliability are insufficient; 2. the reinforcing steel bars are arranged near the middle part of the plate thickness, and cannot play a role in improving the bending resistance and bearing capacity of the pavement. Because the bearing capacity of the road surface depends on the bending tensile strength of concrete, fine soil particles are easy to lose under the repeated action of water suction force caused by vehicle load on a roadbed at the bottom of the edge of the continuously reinforced concrete road surface, so that the continuous reinforced concrete road surface is void, and after the void occurs, a large transverse negative bending moment is generated in the range of about 2.5m at the transverse edge of a rear road panel under the action of vehicle load, so that the transverse tensile stress of the top of the plate is increased rapidly, and once the concrete is cracked by tension, the road surface can be cracked and damaged; 3. the adverse effect of the road surface edge void is not considered, and the safety of the road surface under the action of a heavy-duty vehicle cannot be ensured; 4. the concrete slab has low repeated action times of resisting vehicles, and the edge dead zone is easy to generate fatigue fracture.
Disclosure of Invention
The invention mainly aims to provide a continuous reinforced concrete pavement and a design method thereof, aiming at reducing the probability of impact fracture damage of the pavement.
In order to achieve the aim, the invention provides a continuous reinforced concrete pavement, wherein a steel bar group is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar group, the edge anti-impact reinforcing steel bars are positioned at 0-L parts of the side edge of the pavement, L is 2-3 m, and the reinforcement ratio of the edge anti-impact reinforcing steel bars is greater than or equal to 0.2%.
Preferably, both sides of the concrete pavement are provided with a plurality of edge anti-breaking reinforcing steel bars.
Preferably, the edge anti-impact reinforcing steel bar is transversely arranged relative to the concrete pavement.
Preferably, the reinforcement group includes the erection reinforcing bar of vertical setting, erects the longitudinal reinforcement and the full length anti-impact reinforcement of erecting the reinforcing bar top, and the full length anti-impact reinforcement sets up for concrete road surface is horizontal, longitudinal reinforcement and concrete road surface's length direction parallel arrangement.
Preferably, at least two edge anti-impact reinforcing steel bars are longitudinally arranged between two adjacent through-length anti-impact reinforcing steel bars.
Preferably, the distance between the edge anti-impact reinforcing steel bar and the full-length anti-impact reinforcing steel bar is 200-300 mm; the distance between two adjacent edge anti-breaking reinforcing steel bars is 200-300 mm; the diameter of the edge anti-impact reinforcing steel bar is 14-20 mm.
Preferably, the minimum thickness of the concrete slab satisfies the following formula:
wherein h isminThe minimum thickness of the plate for meeting the design requirement of the extreme anti-impact plate thickness of the road-surface-plate overweight vehicle, Q is the maximum weight of a possible single wheel, ftThe design value of the concrete tensile strength of the continuous reinforced concrete slab, b is the average width of the transverse crack of the continuous reinforced concrete slab, phi is the diameter of the edge anti-impact reinforcing steel bar, eta1Taking 1.2-1.3, eta as the impact coefficient of the automobile2The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab is improved.
Preferably, the reinforcement ratio of the edge anti-break reinforcing steel bar satisfies the following formula:
where ρ is1Minimum reinforcement ratio, N, for fatigue and impact breakage prevention reinforcement barvThe predicted value of the cumulative action times of the wheel load within the design time limit of the road is h, the thickness of the continuous reinforced concrete pavement, rho2More than or equal to 0.2 percent of anti-breaking reinforced steelRho is taken as reinforcement ratio of reinforcement1、ρ2The larger value of (a).
The invention further provides a design method of the continuous reinforced concrete pavement, which comprises the following steps:
determining the minimum plate thickness of the concrete pavement according to the maximum wheel load borne by the continuous reinforced concrete pavement and the concrete strength grade;
the method comprises the following steps that transversely arranged edge anti-impact reinforcing steel bars are arranged in a concrete pavement, a reinforcing steel bar group is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the reinforcing steel bar group, and the length, the distribution interval and the diameter of the edge anti-impact reinforcing steel bars in the continuous reinforced concrete pavement are determined according to the load of a vehicle;
and determining the reinforcement distribution rate of the edge anti-impact reinforcing steel bars according to the designed wheel load action times and the steel bar anti-corrosion requirement.
Preferably, the minimum thickness of the concrete slab satisfies the following formula:
wherein h isminThe minimum thickness of the plate for meeting the design requirement of the extreme anti-impact plate thickness of the road-surface-plate overweight vehicle, Q is the maximum weight of a possible single wheel, ftThe design value of the concrete tensile strength of the continuous reinforced concrete slab, b is the average width of the transverse crack of the continuous reinforced concrete slab, phi is the diameter of the edge anti-impact reinforcing steel bar, eta1Taking 1.2-1.3, eta as the impact coefficient of the automobile2The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab is obtained;
the reinforcement ratio of the edge anti-impact reinforcing steel bar meets the following formula:
where ρ is1Minimum reinforcement ratio, N, for fatigue and impact breakage prevention reinforcement barvThe predicted value of the cumulative action times of the wheel load within the design time limit of the road is h, the thickness of the continuous reinforced concrete pavement, rho2Not less than 0.2%, and rho is taken from the reinforcement ratio of the anti-breaking reinforced steel bar1、ρ2The larger value of (a).
The continuous reinforced concrete pavement provided by the invention has the following beneficial effects:
1) the capacity of resisting the punching force and the bending moment of the overweight vehicle on the road surface can be improved, the road surface is prevented from being broken under the action of the overweight vehicle, and the influence on the use of the road surface and the driving safety caused by the breaking condition is avoided;
2) the concrete pavement can limit the width of pavement cracks, so that the width of the cracks is not more than 0.5mm, water is prevented from permeating, the reinforcing steel bars are prevented from being rusted, the structural durability is improved, and the service life of the pavement is prolonged;
3) the invention can improve the times of vehicle load action which can be borne by the road surface and prolong the service life of the road surface.
Drawings
FIG. 1 is a schematic view of a reinforcement structure in a continuous reinforced concrete pavement according to the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 4 is a schematic cross-sectional view B-B of FIG. 1.
In the figure, 1-full-length anti-impact reinforcing steel bars, 2-edge anti-impact reinforcing steel bars, 3-erection reinforcing steel bars and 4-longitudinal reinforcing steel bars.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a continuous reinforced concrete pavement.
Referring to fig. 1 to 4, a reinforcement group is arranged in a continuous reinforced concrete pavement, a plurality of edge anti-impact reinforcing steel bars 2 are erected above the reinforcement group, the edge anti-impact reinforcing steel bars 2 are positioned at 0-L positions of the side edges of the pavement (the side edges refer to the edges of two sides rather than the edges of the head and the tail of the pavement), L is 2-3 m (preferably 2.5m negative bending moment acting area), and the reinforcement ratio of the edge anti-impact reinforcing steel bars 2 is greater than or equal to 0.2%.
The existing concrete pavement does not consider the larger negative bending moment internal force caused by the suspension of the edge of the pavement slab under the action of vehicle load, and the larger negative bending moment internal force can cause the top of the pavement slab to be broken. According to the invention, through calculation and analysis, 2 edges of anti-impact reinforcing steel bars 2 with the distance D2 of 200-300 mm and the diameter of 14-20 mm are arranged at the top of the road deck in the hogging moment acting area with the side edge L of the road of 0-2.5 m, so that the hogging moment bearing capacity of the road deck can be greatly improved. In addition, by increasing the reinforcement ratio of the reinforcing steel bars, the fatigue stress amplitude of the edge anti-impact reinforcing steel bars 2 can be reduced, the frequency of repeated action of wheel load borne by the reinforcing steel bars is increased, after the pavement cracks, as long as the reinforcing steel bars do not generate fatigue fracture, the reinforcing steel bars can effectively limit further cracking of pavement concrete, the pavement can not lose bearing capacity, and the pavement can continue to bear, so that the service life of the pavement is prolonged. Simultaneously, increase the reinforcing bar arrangement of reinforcement rate, still can restrict the vertical crack in road surface and develop, let the crack width be not more than 0.5mm, prevent water infiltration, guarantee that edge scour protection reinforcing bar 2 can not take place the corrosion, improve structural durability.
Specifically, in this embodiment, a plurality of edge anti-impact reinforcing steel bars 2 are disposed on both sides of the concrete pavement. The edge anti-impact reinforcing steel bars 2 are transversely arranged relative to the concrete pavement.
In this embodiment, referring to fig. 3 and 4, the reinforcement group includes the erection reinforcement 3 that vertically sets up, the longitudinal reinforcement 4 that erects above the erection reinforcement 3 and the full-length anti-impact reinforcement 1, and the full-length anti-impact reinforcement 1 sets up for the concrete pavement is horizontal, and the longitudinal reinforcement 4 sets up with the length direction parallel arrangement of concrete pavement. The longitudinal steel bar 4 and the full-length anti-impact steel bar 1 are horizontally arranged.
At least two edge anti-impact reinforcing steel bars 2 are longitudinally arranged between two adjacent through long anti-impact reinforcing steel bars 1. In the figure of the present embodiment, two are provided as an example. The distance between two adjacent edge anti-impact reinforcing steel bars 2 is 200 mm-300 mm (namely D2 in the figure). The diameter of the edge anti-impact reinforcing steel bar 2 is 14 mm-20 mm. The distance between the edge anti-impact reinforcing steel bar 2 and the full-length anti-impact reinforcing steel bar 1 is also 200-300 mm.
The minimum plate thickness of the concrete pavement satisfies the following formula:
wherein h isminThe minimum thickness of the plate for meeting the design requirement of the extreme anti-impact plate thickness of the road-surface-plate overweight vehicle, Q is the maximum weight of a possible single wheel, ftThe design value of the concrete tensile strength of the continuous reinforced concrete slab, b is the average width of the transverse crack of the continuous reinforced concrete slab, phi is the diameter of the edge anti-impact reinforcing steel bar, eta1Taking 1.2-1.3, eta as the impact coefficient of the automobile2The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab is improved.
The reinforcement ratio of the edge anti-impact reinforcing steel bar 2 meets the following formula:
where ρ is1Minimum reinforcement ratio, N, for fatigue and impact breakage prevention reinforcement barvWheel load for road design yearThe predicted value of the load cumulative action times, h is the thickness of the continuous reinforced concrete pavement, rho2Not less than 0.2 percent, and rho is taken according to the reinforcement ratio of the anti-breaking reinforced bar 21、ρ2The larger value of (a).
The continuous reinforced concrete pavement provided by the invention has the following beneficial effects:
1) the capacity of resisting the punching force and the bending moment of the overweight vehicle on the road surface can be improved, the road surface is prevented from being broken under the action of the overweight vehicle, and the influence on the use of the road surface and the driving safety caused by the breaking condition is avoided;
2) the concrete pavement can limit the width of pavement cracks, so that the width of the cracks is not more than 0.5mm, water is prevented from permeating, the reinforcing steel bars are prevented from being rusted, the structural durability is improved, and the service life of the pavement is prolonged;
3) the invention can improve the times of vehicle load action which can be borne by the road surface and prolong the service life of the road surface.
The invention further provides a design method of the continuous reinforced concrete pavement.
In the preferred embodiment, a method for designing a continuous reinforced concrete pavement comprises the following steps:
determining the minimum plate thickness of the concrete pavement according to the maximum wheel load borne by the continuous reinforced concrete pavement and the concrete grade;
the method comprises the following steps that transversely arranged edge anti-impact reinforcing steel bars 2 are arranged in a concrete pavement, a reinforcing steel bar group is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars 2 are erected above the reinforcing steel bar group, the edge anti-impact reinforcing steel bars 2 are positioned at the edge of the side edge of the road, and the length, the distribution interval and the diameter of the edge anti-impact reinforcing steel bars 2 in the continuously reinforced concrete pavement are determined according to the load of a vehicle;
and determining the reinforcement distribution rate of the edge anti-impact reinforcing steel bars 2 according to the designed wheel load action times and the steel bar anti-corrosion requirement.
In the existing standard design method, the damage and the void of the roadbed caused by the repeated action of the water suction force caused by the vehicle load on the roadbed under the edge road deck are not considered, the void of the roadbed can cause the edge of the road deck to be suspended, the shearing force caused by the vehicle load in the plate is increased, and the road deck at the suspended position is easy to be subjected to shearing, breaking and damaging under the action of a heavy-load vehicle.
Wherein:
hminthe minimum plate thickness (mm) meeting the design requirement of the extreme anti-impact plate thickness of the road surface plate overweight vehicle;
q-maximum weight of a single wheel (N) that may occur;
ftthe design value of the concrete tensile strength of the continuous reinforced concrete plate can be obtained according to the current specification (MPa);
b-the average width of the transverse crack of the continuous reinforced concrete plate, which can be calculated according to the current specification (mm);
phi is the diameter (mm) of the edge anti-impact reinforcing steel bar 2;
η1and the automobile impact coefficient is 1.2-1.3, interpolation is carried out according to the running speed of 60 km/h-120 km/h, 1.3 is taken when the running speed is more than 120km/h, and 1.2 is taken when the running speed is less than 60 km/h.
η2The transverse crack load transfer coefficient of the continuous reinforced concrete plate can be calculated according to the current specification.
The existing standard design method does not consider the larger negative bending moment internal force caused by the edge of the road deck being hollow under the action of vehicle load, and the larger negative bending moment internal force can cause the top of the road deck to be broken. The existing standard design method disposes the reinforcing bar in the middle part of the pavement slab cross section, can not play the effect of improving the bending resistance bearing capacity of the pavement slab, this invention is through disposing 2 marginal anti-impact reinforcing bars 2 that interval D2 is 200 mm-300 mm, diameter 14 mm-20 mm at road side edge L ═ 0 ~ 2.5m hogging moment effect area pavement slab top, can improve the hogging moment bearing capacity of pavement slab by a wide margin, can effectively deal with the marginal hogging moment impact damage that vehicle overload arouses.
The current regulations do not include reinforcement fatigue preventionThe invention relates to a punching design, and a design method is improved. The invention considers the fatigue damage of the reinforcing steel bar caused by the repeated action of the vehicle load, reduces the fatigue stress amplitude of the edge anti-impact reinforcing steel bar 2 by increasing the reinforcing steel bar arrangement rate, improves the repeated action times of the wheel load which can be born by the reinforcing steel bar, and can effectively limit the further cracking of the pavement concrete as long as the reinforcing steel bar is not subjected to fatigue fracture after the pavement is cracked, and the pavement can continue to bear without losing the bearing capacity, thereby improving the service life of the pavement. The invention provides a predicted value N of the cumulative action times of the wheel load within the design period of the road through calculation and analysisvReinforcement ratio rho of reinforcement bar 2 preventing edge from breaking1(calculation formula of (%).
Wherein: rho1Anti-break reinforcing steel bar 2 minimum reinforcement ratio (%) meeting reinforcement fatigue and anti-break
Nv-wheel load cumulative action frequency prediction value (times) within road design years
h-thickness (mm) of continuous reinforced concrete slab
The current standard design method does not consider the anti-corrosion design of the transverse steel bar, and the invention is improved. Prevent breaking reinforcing bar 2 through the configuration edge, the vertical crack in restriction road surface develops, lets the crack width be not more than 0.5mm, prevents the water infiltration, guarantees that edge scour protection breaks reinforcing bar 2 and can not take place the corrosion, improves structural durability, extension road surface service life. The reinforcement ratio value range of the edge anti-impact reinforcement bar 2 is rho2Not less than 0.2 percent, and can meet the requirement of rust prevention.
Rho should be taken according to reinforcement ratio of anti-impact reinforcing steel bar 21、ρ2The larger value of (a).
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are intended to be covered by the scope of the present invention.
Claims (10)
1. A continuous reinforced concrete pavement is characterized in that a steel bar group is arranged inside the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar group, the edge anti-impact reinforcing steel bars are located at 0-L positions of the side edges of the pavement, L is 2-3 m, and the reinforcement ratio of the edge anti-impact reinforcing steel bars is greater than or equal to 0.2%.
2. A continuous reinforced concrete pavement according to claim 1 wherein a plurality of edge anti-break reinforcing bars are provided on each side of the pavement.
3. A continuous reinforced concrete roadway as claimed in claim 1 wherein said edge anti-washout reinforcement bars are disposed transversely of the roadway.
4. The continuous reinforced concrete pavement of claim 3, wherein the set of rebars comprises vertically disposed erection rebars, longitudinal rebars disposed above the erection rebars, and on-length anti-breaking rebars, the on-length anti-breaking rebars being disposed transversely with respect to the concrete pavement, the longitudinal rebars being disposed parallel to the length of the concrete pavement.
5. A continuous reinforced concrete pavement according to claim 3 wherein at least two edge impact reinforcement bars are disposed longitudinally between adjacent through-length impact reinforcement bars.
6. The continuous reinforced concrete pavement of claim 3, wherein the distance between the edge anti-impact reinforcing steel bars and the full-length anti-impact reinforcing steel bars is 200mm to 300 mm; the diameter of the edge anti-impact reinforcing steel bar is 14-20 mm; the distance between two adjacent edge anti-breaking reinforcing steel bars is 200-300 mm. .
7. A continuous reinforced concrete pavement according to claim 1 wherein the minimum slab thickness of the pavement satisfies the following equation:
wherein h isminThe minimum thickness of the plate for meeting the design requirement of the extreme anti-impact plate thickness of the road-surface-plate overweight vehicle, Q is the maximum weight of a possible single wheel, ftThe design value of the concrete tensile strength of the continuous reinforced concrete slab, b is the average width of the transverse crack of the continuous reinforced concrete slab, phi is the diameter of the edge anti-impact reinforcing steel bar, eta1Taking 1.2-1.3, eta as the impact coefficient of the automobile2The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab is improved.
8. A continuous reinforced concrete pavement according to any one of claims 1 to 7 wherein the reinforcement ratio of the edge anti-impact reinforcing bars satisfies the following formula:
where ρ is1Minimum reinforcement ratio, N, for fatigue and impact breakage prevention reinforcement barvThe predicted value of the cumulative action times of the wheel load within the design time limit of the road is h, the thickness of the continuous reinforced concrete pavement, rho2Not less than 0.2%, and rho is taken from the reinforcement ratio of the anti-breaking reinforced steel bar1、ρ2The larger value of (a).
9. A design method of a continuous reinforced concrete pavement is characterized by comprising the following steps:
determining the minimum plate thickness of the concrete pavement according to the maximum wheel load borne by the continuous reinforced concrete pavement and the concrete grade;
the method comprises the following steps that transversely arranged edge anti-impact reinforcing steel bars are arranged in a concrete pavement, a steel bar group is arranged in the concrete pavement, a plurality of edge anti-impact reinforcing steel bars are erected above the steel bar group, the edge anti-impact reinforcing steel bars are positioned at the edge of the side edge of a road, and the length, the distribution interval and the diameter of the edge anti-impact reinforcing steel bars in the continuously reinforced concrete pavement are determined according to the load of a vehicle;
and determining the reinforcement distribution rate of the edge anti-impact reinforcing steel bars according to the designed wheel load action times and the steel bar anti-corrosion requirement.
10. A method of designing a continuous reinforced concrete slab as claimed in claim 9, wherein the minimum slab thickness of the slab satisfies the following equation:
wherein h isminThe minimum thickness of the plate for meeting the design requirement of the extreme anti-impact plate thickness of the road-surface-plate overweight vehicle, Q is the maximum weight of a possible single wheel, ftThe design value of the concrete tensile strength of the continuous reinforced concrete slab, b is the average width of the transverse crack of the continuous reinforced concrete slab, phi is the diameter of the edge anti-impact reinforcing steel bar, eta1Taking 1.2-1.3, eta as the impact coefficient of the automobile2The load transfer coefficient of the transverse crack of the continuous reinforced concrete slab is obtained;
the reinforcement ratio of the edge anti-impact reinforcing steel bar meets the following formula:
where ρ is1Minimum reinforcement ratio, N, for fatigue and impact breakage prevention reinforcement barvThe predicted value of the cumulative action times of the wheel load within the design time limit of the road is h, the thickness of the continuous reinforced concrete pavement, rho2Not less than 0.2%, and rho is taken from the reinforcement ratio of the anti-breaking reinforced steel bar1、ρ2The larger value of (a).
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886360A (en) * | 2009-05-14 | 2010-11-17 | 深圳市海川实业股份有限公司 | Continuous reinforced concrete pavement structure and construction method thereof |
| KR101605512B1 (en) * | 2015-07-01 | 2016-03-29 | 경희대학교 산학협력단 | Construction of continuously reinforced concrete pavements |
| CN205329462U (en) * | 2016-01-31 | 2016-06-22 | 河北工业大学 | Structure is handled to cement concrete pavement seam of wrong platform of prevention inter -plate |
| CN212388284U (en) * | 2020-05-29 | 2021-01-22 | 抚州玉茗远大建筑工业有限公司 | Assembled road plate |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886360A (en) * | 2009-05-14 | 2010-11-17 | 深圳市海川实业股份有限公司 | Continuous reinforced concrete pavement structure and construction method thereof |
| KR101605512B1 (en) * | 2015-07-01 | 2016-03-29 | 경희대학교 산학협력단 | Construction of continuously reinforced concrete pavements |
| CN205329462U (en) * | 2016-01-31 | 2016-06-22 | 河北工业大学 | Structure is handled to cement concrete pavement seam of wrong platform of prevention inter -plate |
| CN212388284U (en) * | 2020-05-29 | 2021-01-22 | 抚州玉茗远大建筑工业有限公司 | Assembled road plate |
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